London is among the world's most visited cities, with countless attractions and a history stretching back two millennia. Visitors will discover historic iconic structures like Westminster Abbey, Big Ben, and Tower Bridge, as well as recent marvels such as London Eye, a giant observation wheel that offers breathtaking views of the whole city.

A favorite for many cruise-goers and tourists, Ketchikan, Alaska, is a charming city located near the state’s southeastern edge.

Reshaped by volcanic activity, the rugged yet enchanting Santorini beckons all seafaring souls in the Aegean Sea. Visitors to this breathtaking and romantic Cyclades archipelago will gaze at the whitewashed cubiform houses sitting cliffside and hovering over the water.

St. Lucia is an island of verdant landscapes in every direction: A dense rain forest rises up and covers The Pitons' twin peaks, and in the valleys, the sun's rays dance upon the large yellow-green leaves of banana plants. Beyond all the greenery, you'll find isolated coves, stunning beaches, colonial towns, quiet fishing villages and first-class yachting facilities.

Known as the "Garden Island," Kauai is Hawaii's oldest island and a tropical paradise. Covered with verdant rainforests, glittering waterfalls, and immense cliffs, Kauai will astound you at every turn. This island is the perfect destination for outdoor adventures, with activities from kayaking, to ziplining, to snorkeling. Better yet, marvel at the island's natural beauty, from the scenic cliffsides of Nāpali Coast State Wilderness Park to the resort beaches of Poipu.